Process of forming rings.



H. HENRIGH.

PROCESS OF FORMING RINGS.

APPLICATION FILED SEPT. 29, 1911.

Patented Dec.3, 1912.

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HENRY HENRICI-I, OF NEW YORK, N. Y.

PROCESS OF FORMING RINGS.

Specification of Letters Patent.

Patented Dec. 3,1912.

To all whom it may concern:

Be it known that I, HENRY HENRIOH, of New York, in the county of NewYork, and in the State of New York, have invented a certain new anduseful Improvement in Processes of Forming Rings, and do hereby declarethat the following is a full, clear, and exact description thereof.-

My invention relates particularly to a process of forming finger rings,especially plain band rings.

The object of my invention is to simplify the steps necessary in formingfinger rings, and to insure that the rings which are made in accordancewith the process in question shall have a central opening that isperfectly cylindrical.

In the accompanying drawings I have shown certain apparatus which isadapted for carrying out my process, in which- Figure 1 is a verticalsection of the apparatus showing the blank after the completion of thefirst forming operation; Fig. 2 is a similar section showing the blankafter the completion of the second forming operation; Fig. 3 is asimilar section showing the blank after the completion of the third andlast forming operation; Fig. 4 is a vertical section of the flat blankin the shape of a washer; Fig. 5 is an elevation of the blank after thefirst forming operation; Fig. 6 is an elevation of the blank after thesecond forming operation; and Fig. 7 is an elevation of the completedformed blank.

In the drawings, 1 represents a metal base. The base 1 has two slots 2to receive bolts or other means for attaching it to its support. At thecenter of the base 1 there is a raised portion 3- having a centralopening 4 to receive a female die 5 having a conical opening 5 at itscenter. At one side of the opening 4 there is located a sliding block 6rendered adjustable by means of a screw 7. By operating the screw 7, thefemale die 5 may be secured tightly in posit-ion. The cylindricalopening 8 extends from the center of the opening 4 through the base 1and at the top of the opening 8 there is located a cylindrical shoulder9. The shoulder 9 is designed to support a barrel 10 carrying a plunger11 pressed upwardly by a spring 11 which is screw-threaded on its lowerend to receive a nut 12. The plunger 11 is designed to yieldinglysupport a center pin 13. A male die 14 is provided, which comprises ashank to be held in a power punch or other apparatus for operating themale die, a conical projection 16 at the lower end of the die and ashoulder 17, located above the conical projection 16. It will be notedthat the projection 16 is comparatively long for a reason to behereinafter referred to. The only other apparatus required is a flatpunch 18 which has a shank 19.

In the operation of my process, a blank 20 in the shape of a washer asshown in Fig. 4 is punched out of a flat sheet of metal. The female die5 is then placed in the base 1, the spring pressed plunger 11 beingomitted. The blank 20 is then placed in the conical opening 5 of thefemale die 5, and the male die 14 is pressed downwardly upon the blank20 until the blank assumes the shape of the conically formed blank 21 asshown in Fig. The conical projection 16 1S longer than the width of anyone side of the blank 20 so that during the formation of the conicallyformed blank 21 the shoulder 17 will fall upon the upper edge of theconically formed blank 21. If the conical projection 16 were shorter,the operation could not possibly be performed in this way, but theshoulder 17 would then fall opposite some portion of the body of theblank 20 in forming the conically formed blank 21. After this, thebarrel 10 carrying the spring pressed plunger 11 is inserted into thebase 1 with the female die 5. The center pin 13 is then supported uponthe spring pressed plunger 11, the conically formed blank being placedover the pin 13 with its end having the smaller diameter pointed upward.The flat punch 18 is now brought down upon the blank 21 and as a resultthe formed blank 22 is produced, having a central ridge located slightlyabove its center and two conical surfaces ending in said ridge. Theformed blank 22 is now turned over or reversed in the female die 5 andthe operation with the flat punch 18 repeated. This results in producinga blank 23 having a ridge located exactly in the center with symmetricalconical surfaces ending in the ridge. In this shape the blank is in aconvenient condition for finishing by rolling to give the ring the usualcurved exterior surface and is of such a character that the percentageof loss is small in finishing the ring. The use of the center pin 13also insures that the central opening of the blank 23 is exactlycylindrical, which is a very import-ant matter in the manufacture of finger rings.

It will be noted that the parts which bear the strain of the formingoperations, to Wit: the base 1, the female die 5, the center pin 13, themale die let and the flat punch 18, are of the strongest possibleconstruction, and that they do not contain any subsidiary parts whichbecause of their small size, always have a tendency to break.

I/Nhile I have described my invention above in detail, I Wish it to beunderstood that many changes may be made therein without departing fromthe spirit of my invention within the scope of the appended claims.

I claim:

1. A process of the character described, forming a washer-shaped blankinto a truncated, hollow cone, having an outer surface parallel with theinner surface, shaping the inner surface to conform to a perfectcylinder and then completing the ring.

2. A process of the character described, forming a washer-shaped blankinto a truncated, hollow cone, having an outer surface parallel with theinner surface, shaping the inner surface to conform to a perfectcylinder, and then forming the outer portion with two conical surfacesto make the ring thickest along a central line.

3. A process of the character described, forming a washer-shaped blankinto a truncated, hollow cone, having an outer surface parallel with theinner surface, shaping the inner surface to conform to a perfectcylinder, then forming the outer portion with two conical surfaces tomake the ring thickest along a central line, and finishing the ring byproducing a curved surface upon its exterior.

In testimony that I claim the foregoing I have hereunto set my hand.

HENRY HENRICH.

IVitnesses ARTHUR WRIGHT, J. FRENDENVOLL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

